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Genius

I mentioned this is the official thread, but though it prudent to make it's own thread so people can find it easier.

Go into Settings, and then General and turn OFF Location Services. If you don't know what they are, then you probably don't use it, and don't need it on. It's kind of like having Bluetooth on and not using a headset.

I believe, ( and I could be wrong, but only time will tell) that Location Services run in the background Full Time, and apps use it for showing where you are, whether it be for Weather, or Maps, Social Networking, Picture Blogging, etc...
If you aren't sure whether or not you need it, turn it off and see if any of your apps ask for it. if it's off and you don't miss it, then you never needed it in the first place.

Contributor

I mentioned this is the official thread, but though it prudent to make it's own thread so people can find it easier.

Go into Settings, and then General and turn OFF Location Services. If you don't know what they are, then you probably don't use it, and don't need it on. It's kind of like having Bluetooth on and not using a headset.

I believe, ( and I could be wrong, but only time will tell) that Location Services run in the background Full Time, and apps use it for showing where you are, whether it be for Weather, or Maps, Social Networking, Picture Blogging, etc...
If you aren't sure whether or not you need it, turn it off and see if any of your apps ask for it. if it's off and you don't miss it, then you never needed it in the first place.

Genius

Well, as far as my test goes, I am 99% sure that that the locator service chews up battery.
As I write this, I have about 1/4th of the battery icon missing and usage is at 3 Hours. That's 47 minutes of calls, and the rest is edge browsing (2.6MB) and a combination of iPod and apps.
This morning's 40 minutes of usage was from my alarms and a handful of SMS only and it showed about an eighth of the battery missing.
Test for yourselves though. I don't want to tell everyone this, and I am the only one that is experiencing the problem.

Contributor

Well, as far as my test goes, I am 99% sure that that the locator service chews up battery.
As I write this, I have about 1/4th of the battery icon missing and usage is at 3 Hours. That's 47 minutes of calls, and the rest is edge browsing (2.6MB) and a combination of iPod and apps.
This morning's 40 minutes of usage was from my alarms and a handful of SMS only and it showed about an eighth of the battery missing.
Test for yourselves though. I don't want to tell everyone this, and I am the only one that is experiencing the problem.

Zealot

I noticed a HUGE delay when apps needed to use Contacts, like when you want to email a photo and use Contacts to select the address. When I clicked the + in the Send field, the delay was so bad, I almost fell asleep waiting! Turning Location Services off seems to help a LOT!

I don't know about battery life but I did notice it wasn't as good as before 2.0 so maybe that'll get better too. Thanks Hawk

Are you sure that the new Location Services have to be on for E911 to work with the iPhone? One of my old cell phones had a setting where you could either turn this service off or on but it came out long before the iPhone. I would assume that even the V1 iPhone had this capability before the 2.0 upgrade. Also, I thought EMS and LE could triangulate your location based on the cell towers you were hitting.